Page 254 - Basic College Mathematics with Early Integers

S E C T I O N 3.5 I ADDING AND SUBTRACTING UNLIKE FRACTIONS 231

13
81. About of American students ages 10 to 17 name 82. In the 2007 FIA Formula One World Championship,
20 9
math, science, or art as their favorite subject in the Ferrari team won of all races. If the Ferrari
4 17 3
school.Art is the favorite subject for about of the driver Kimi Räikkönen won of the races, how
25 17
American students ages 10 to 17. For what fraction many did Ferrari driver Lewis Hamilton win?
of students this age is math or science their favorite (Source: Formula1.com)
subject? (Source: Peter D. Hart Research Associates
for the National Science Foundation)

83. Given the following diagram, find its total length. 84. Given the following diagram, find its total width.

length
11 inch
16
width ç inch
11
16 inch

9
32
inch
q inch 11 inch
16

The table below shows the fraction of the Earth’s water area taken up by each ocean. Use this table for Exercises 85 and 86.

Arctic Ocean
Fraction of Earth’s Water Area per Ocean
Ocean Fraction Atlantic Pacific
Ocean Ocean
1 Pacific
Arctic Ocean Indian
25 Ocean
13
Atlantic
50
1
Pacific 85. What fraction of the world’s water surface area is
2
accounted for by the Pacific and Atlantic Oceans?
1
Indian
5
86. What fraction of the world’s water surface area is
accounted for by the Arctic and Indian Oceans?
Use this circle graph to answer Exercises 87 through 90.

Areas Maintained by the National Park Service 87. What fraction of areas maintained by the National
Park Service are designated as National Lakes or
4 33
Parks Historic Parks National Seashores?
25 100
Parkways/ 88. What fraction of areas maintained by the National
1
Scenic Trails Park Service are designated as National Recreation
50
Recreation Areas?
2 Areas 1
Memorials 20
25
89. What fraction of areas maintained by the National
1
Rivers Park Service are NOT National Monuments?
25
Lakes/ 21
1 Monuments
Seashores 100 90. What fraction of areas maintained by the National
25 7
Battlefields Park Service are NOT National Parkways or Scenic
100
Trails?
Source: National Park Service